"I'm psyched. It's my birthday! Go, Lizzie. It's your birthday," Rovsek happily sang as she boarded a party limousine before everyone started calling to cancel, citing colds and sick kids. "I don't think I've ever had a birthday party where no one showed up," she said.

"Who's your BFF this day?" Gunvalson asked, clinking champagne glasses before giving a hearty "Woo-hoo!" once they made it to the restaurant in Los Angeles. "Thank God I'm here, or you'd be sitting here by yourself."

But Rovsek may have wished she had been after overhearing Gunvalson telling boyfriend Brooks, before boarding the limo, "I can't believe I have to hang out with dumb and dumber," referring to the party girl and her friend Danielle Gregorio.

Tamra Barney probably wished she had been there, too – to defend herself.

The icing on Rovsek's unhappy birthday cake was Gunvalson talking nonstop about Barney's recent history of stirring the pot – from telling Shannon Beador that the Dubrows wanted to take the Beadors down to telling everyone to be wary of Brooks.

"Being friends with Tamra is complicated," Gunvalson told Rovsek. "So, if you are, be prepared to get hurt."

There was only laughter, however, at an elegant Valentine's Day party Heather Dubrow hosted at the St. Regis, where each attendee had to answer a card with a sexy question, including "What is your freak factor?"

Barney, of course, said one's "freak factor" could be participating in a certain taboo sex act.

"A lady never talks about her freak factor," said Barney, "but since I'm not a lady … mine's off the charts."

What was really off the charts, however, was witnessing Barney and Dubrow sit down with Beador and invite her on their girls' trip to Bali. "I'm surprised at the invitation," said a stunned Beador, "but I'm going to take that olive branch."

The Real Housewives of Orange County heads to Bali next Monday (9 p.m. ET) on Bravo.